package org.juggers.services;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.util.ArrayList;
import java.util.List;

import javax.persistence.NoResultException;

import org.juggers.domain.AlreadySubscribedException;
import org.juggers.domain.Event;
import org.juggers.domain.NotEnoughSeatsException;
import org.juggers.domain.NotSubscribedException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.annotation.Secured;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author <a href="mailto:michel@breizhjug.org">Michel DAVID</a>
 */
@Service( "eventService" )
public class DefaultEventService
    implements EventService
{

    private int maxUpcomingEvents;

    /**
     * @param maxUpcomingEvents the maxUpcomingEvents to set
     */
    public void setMaxUpcomingEvents( int maxUpcomingEvents )
    {
        this.maxUpcomingEvents = maxUpcomingEvents;
    }

    @Autowired
    private UserService userService;

    @Override
    @Transactional
    @Secured( { "ROLE_ADMIN", "ROLE_JUG_ADMIN" } )
    public Event create( Event event )
    {
        event.persist();
        return event;
    }

    @Override
    @Transactional
    public List<Event> getUpcomingEvents()
    {
        return new ArrayList<Event>( Event.findAll( maxUpcomingEvents ) );
    }

    @Override
    @Transactional
    @Secured( { "ROLE_JUGGER" } )
    public Event subscribe( Event event )
        throws NotEnoughSeatsException, AlreadySubscribedException
    {
        event.refresh();
        event.subscribe( userService.getConnectedUser() );
        return event;
    }

    @Override
    @Transactional
    @Secured( { "ROLE_JUGGER" } )
    public Event unsubscribe( Event event )
        throws NotSubscribedException
    {
        event.refresh();
        event.unsubscribe( userService.getConnectedUser() );
        return event;
    }

    @Override
    @Transactional
    @Secured( { "ROLE_ADMIN", "ROLE_JUG_ADMIN" } )
    public void delete( Event event )
    {
        event.remove();
    }

    @Override
    public Event get( Long id )
    {
        try
        {
            return Event.findById( id );
        }
        catch ( NoResultException ex )
        {
            return null;
        }
    }

    @Override
    @Transactional
    public List<Event> getEvents( Long userGroupId )
    {
        return new ArrayList<Event>( Event.findByOrganizerId( userGroupId ) );
    }

    @Override
    @Transactional
    @Secured( { "ROLE_ADMIN", "ROLE_JUG_ADMIN" } )
    public Event update( Event event )
    {
        return event.merge();
    }

}
